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sys/netinet/sctp_timer.c
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1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* $KAME: sctp_timer.c,v 1.29 2005/03/06 16:04:18 itojun Exp $ */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/8.2/sys/netinet/sctp_timer.c 215583 2010-11-20 19:37:00Z tuexen $"); 35 36 #define _IP_VHL 37 #include <netinet/sctp_os.h> 38 #include <netinet/sctp_pcb.h> 39 #ifdef INET6 40 #endif 41 #include <netinet/sctp_var.h> 42 #include <netinet/sctp_sysctl.h> 43 #include <netinet/sctp_timer.h> 44 #include <netinet/sctputil.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_header.h> 47 #include <netinet/sctp_indata.h> 48 #include <netinet/sctp_asconf.h> 49 #include <netinet/sctp_input.h> 50 #include <netinet/sctp.h> 51 #include <netinet/sctp_uio.h> 52 #include <netinet/udp.h> 53 54 55 void 56 sctp_early_fr_timer(struct sctp_inpcb *inp, 57 struct sctp_tcb *stcb, 58 struct sctp_nets *net) 59 { 60 struct sctp_tmit_chunk *chk, *tp2; 61 struct timeval now, min_wait, tv; 62 unsigned int cur_rtt, cnt = 0, cnt_resend = 0; 63 64 /* an early FR is occuring. */ 65 (void)SCTP_GETTIME_TIMEVAL(&now); 66 /* get cur rto in micro-seconds */ 67 if (net->lastsa == 0) { 68 /* Hmm no rtt estimate yet? */ 69 cur_rtt = stcb->asoc.initial_rto >> 2; 70 } else { 71 72 cur_rtt = ((net->lastsa >> 2) + net->lastsv) >> 1; 73 } 74 if (cur_rtt < SCTP_BASE_SYSCTL(sctp_early_fr_msec)) { 75 cur_rtt = SCTP_BASE_SYSCTL(sctp_early_fr_msec); 76 } 77 cur_rtt *= 1000; 78 tv.tv_sec = cur_rtt / 1000000; 79 tv.tv_usec = cur_rtt % 1000000; 80 min_wait = now; 81 timevalsub(&min_wait, &tv); 82 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 83 /* 84 * if we hit here, we don't have enough seconds on the clock 85 * to account for the RTO. We just let the lower seconds be 86 * the bounds and don't worry about it. This may mean we 87 * will mark a lot more than we should. 88 */ 89 min_wait.tv_sec = min_wait.tv_usec = 0; 90 } 91 chk = TAILQ_LAST(&stcb->asoc.sent_queue, sctpchunk_listhead); 92 for (; chk != NULL; chk = tp2) { 93 tp2 = TAILQ_PREV(chk, sctpchunk_listhead, sctp_next); 94 if (chk->whoTo != net) { 95 continue; 96 } 97 if (chk->sent == SCTP_DATAGRAM_RESEND) 98 cnt_resend++; 99 else if ((chk->sent > SCTP_DATAGRAM_UNSENT) && 100 (chk->sent < SCTP_DATAGRAM_RESEND)) { 101 /* pending, may need retran */ 102 if (chk->sent_rcv_time.tv_sec > min_wait.tv_sec) { 103 /* 104 * we have reached a chunk that was sent 105 * some seconds past our min.. forget it we 106 * will find no more to send. 107 */ 108 continue; 109 } else if (chk->sent_rcv_time.tv_sec == min_wait.tv_sec) { 110 /* 111 * we must look at the micro seconds to 112 * know. 113 */ 114 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 115 /* 116 * ok it was sent after our boundary 117 * time. 118 */ 119 continue; 120 } 121 } 122 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_EARLYFR_LOGGING_ENABLE) { 123 sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 124 4, SCTP_FR_MARKED_EARLY); 125 } 126 SCTP_STAT_INCR(sctps_earlyfrmrkretrans); 127 chk->sent = SCTP_DATAGRAM_RESEND; 128 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 129 /* double book size since we are doing an early FR */ 130 chk->book_size_scale++; 131 cnt += chk->send_size; 132 if ((cnt + net->flight_size) > net->cwnd) { 133 /* Mark all we could possibly resend */ 134 break; 135 } 136 } 137 } 138 if (cnt) { 139 /* 140 * JRS - Use the congestion control given in the congestion 141 * control module 142 */ 143 stcb->asoc.cc_functions.sctp_cwnd_update_after_fr_timer(inp, stcb, net); 144 } else if (cnt_resend) { 145 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_EARLY_FR_TMR, SCTP_SO_NOT_LOCKED); 146 } 147 /* Restart it? */ 148 if (net->flight_size < net->cwnd) { 149 SCTP_STAT_INCR(sctps_earlyfrstrtmr); 150 sctp_timer_start(SCTP_TIMER_TYPE_EARLYFR, stcb->sctp_ep, stcb, net); 151 } 152 } 153 154 void 155 sctp_audit_retranmission_queue(struct sctp_association *asoc) 156 { 157 struct sctp_tmit_chunk *chk; 158 159 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n", 160 asoc->sent_queue_retran_cnt, 161 asoc->sent_queue_cnt); 162 asoc->sent_queue_retran_cnt = 0; 163 asoc->sent_queue_cnt = 0; 164 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 165 if (chk->sent == SCTP_DATAGRAM_RESEND) { 166 sctp_ucount_incr(asoc->sent_queue_retran_cnt); 167 } 168 asoc->sent_queue_cnt++; 169 } 170 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 171 if (chk->sent == SCTP_DATAGRAM_RESEND) { 172 sctp_ucount_incr(asoc->sent_queue_retran_cnt); 173 } 174 } 175 TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) { 176 if (chk->sent == SCTP_DATAGRAM_RESEND) { 177 sctp_ucount_incr(asoc->sent_queue_retran_cnt); 178 } 179 } 180 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n", 181 asoc->sent_queue_retran_cnt, 182 asoc->sent_queue_cnt); 183 } 184 185 int 186 sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 187 struct sctp_nets *net, uint16_t threshold) 188 { 189 if (net) { 190 net->error_count++; 191 SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n", 192 net, net->error_count, 193 net->failure_threshold); 194 if (net->error_count > net->failure_threshold) { 195 /* We had a threshold failure */ 196 if (net->dest_state & SCTP_ADDR_REACHABLE) { 197 net->dest_state &= ~SCTP_ADDR_REACHABLE; 198 net->dest_state |= SCTP_ADDR_NOT_REACHABLE; 199 net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY; 200 if (net == stcb->asoc.primary_destination) { 201 net->dest_state |= SCTP_ADDR_WAS_PRIMARY; 202 } 203 /* 204 * JRS 5/14/07 - If a destination is 205 * unreachable, the PF bit is turned off. 206 * This allows an unambiguous use of the PF 207 * bit for destinations that are reachable 208 * but potentially failed. If the 209 * destination is set to the unreachable 210 * state, also set the destination to the PF 211 * state. 212 */ 213 /* 214 * Add debug message here if destination is 215 * not in PF state. 216 */ 217 /* Stop any running T3 timers here? */ 218 if ((stcb->asoc.sctp_cmt_on_off == 1) && 219 (stcb->asoc.sctp_cmt_pf > 0)) { 220 net->dest_state &= ~SCTP_ADDR_PF; 221 SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from PF to unreachable.\n", 222 net); 223 } 224 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 225 stcb, 226 SCTP_FAILED_THRESHOLD, 227 (void *)net, SCTP_SO_NOT_LOCKED); 228 } 229 } 230 /*********HOLD THIS COMMENT FOR PATCH OF ALTERNATE 231 *********ROUTING CODE 232 */ 233 /*********HOLD THIS COMMENT FOR END OF PATCH OF ALTERNATE 234 *********ROUTING CODE 235 */ 236 } 237 if (stcb == NULL) 238 return (0); 239 240 if (net) { 241 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { 242 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 243 sctp_misc_ints(SCTP_THRESHOLD_INCR, 244 stcb->asoc.overall_error_count, 245 (stcb->asoc.overall_error_count + 1), 246 SCTP_FROM_SCTP_TIMER, 247 __LINE__); 248 } 249 stcb->asoc.overall_error_count++; 250 } 251 } else { 252 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 253 sctp_misc_ints(SCTP_THRESHOLD_INCR, 254 stcb->asoc.overall_error_count, 255 (stcb->asoc.overall_error_count + 1), 256 SCTP_FROM_SCTP_TIMER, 257 __LINE__); 258 } 259 stcb->asoc.overall_error_count++; 260 } 261 SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n", 262 &stcb->asoc, stcb->asoc.overall_error_count, 263 (uint32_t) threshold, 264 ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state)); 265 /* 266 * We specifically do not do >= to give the assoc one more change 267 * before we fail it. 268 */ 269 if (stcb->asoc.overall_error_count > threshold) { 270 /* Abort notification sends a ULP notify */ 271 struct mbuf *oper; 272 273 oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 274 0, M_DONTWAIT, 1, MT_DATA); 275 if (oper) { 276 struct sctp_paramhdr *ph; 277 uint32_t *ippp; 278 279 SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) + 280 sizeof(uint32_t); 281 ph = mtod(oper, struct sctp_paramhdr *); 282 ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 283 ph->param_length = htons(SCTP_BUF_LEN(oper)); 284 ippp = (uint32_t *) (ph + 1); 285 *ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_1); 286 } 287 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_1; 288 sctp_abort_an_association(inp, stcb, SCTP_FAILED_THRESHOLD, oper, SCTP_SO_NOT_LOCKED); 289 return (1); 290 } 291 return (0); 292 } 293 294 /* 295 * sctp_find_alternate_net() returns a non-NULL pointer as long 296 * the argument net is non-NULL. 297 */ 298 struct sctp_nets * 299 sctp_find_alternate_net(struct sctp_tcb *stcb, 300 struct sctp_nets *net, 301 int mode) 302 { 303 /* Find and return an alternate network if possible */ 304 struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL; 305 int once; 306 307 /* JRS 5/14/07 - Initialize min_errors to an impossible value. */ 308 int min_errors = -1; 309 uint32_t max_cwnd = 0; 310 311 if (stcb->asoc.numnets == 1) { 312 /* No others but net */ 313 return (TAILQ_FIRST(&stcb->asoc.nets)); 314 } 315 /* 316 * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate 317 * net algorithm. This algorithm chooses the active destination (not 318 * in PF state) with the largest cwnd value. If all destinations are 319 * in PF state, unreachable, or unconfirmed, choose the desination 320 * that is in PF state with the lowest error count. In case of a 321 * tie, choose the destination that was most recently active. 322 */ 323 if (mode == 2) { 324 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 325 /* 326 * JRS 5/14/07 - If the destination is unreachable 327 * or unconfirmed, skip it. 328 */ 329 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 330 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 331 continue; 332 } 333 /* 334 * JRS 5/14/07 - If the destination is reachable 335 * but in PF state, compare the error count of the 336 * destination to the minimum error count seen thus 337 * far. Store the destination with the lower error 338 * count. If the error counts are equal, store the 339 * destination that was most recently active. 340 */ 341 if (mnet->dest_state & SCTP_ADDR_PF) { 342 /* 343 * JRS 5/14/07 - If the destination under 344 * consideration is the current destination, 345 * work as if the error count is one higher. 346 * The actual error count will not be 347 * incremented until later in the t3 348 * handler. 349 */ 350 if (mnet == net) { 351 if (min_errors == -1) { 352 min_errors = mnet->error_count + 1; 353 min_errors_net = mnet; 354 } else if (mnet->error_count + 1 < min_errors) { 355 min_errors = mnet->error_count + 1; 356 min_errors_net = mnet; 357 } else if (mnet->error_count + 1 == min_errors 358 && mnet->last_active > min_errors_net->last_active) { 359 min_errors_net = mnet; 360 min_errors = mnet->error_count + 1; 361 } 362 continue; 363 } else { 364 if (min_errors == -1) { 365 min_errors = mnet->error_count; 366 min_errors_net = mnet; 367 } else if (mnet->error_count < min_errors) { 368 min_errors = mnet->error_count; 369 min_errors_net = mnet; 370 } else if (mnet->error_count == min_errors 371 && mnet->last_active > min_errors_net->last_active) { 372 min_errors_net = mnet; 373 min_errors = mnet->error_count; 374 } 375 continue; 376 } 377 } 378 /* 379 * JRS 5/14/07 - If the destination is reachable and 380 * not in PF state, compare the cwnd of the 381 * destination to the highest cwnd seen thus far. 382 * Store the destination with the higher cwnd value. 383 * If the cwnd values are equal, randomly choose one 384 * of the two destinations. 385 */ 386 if (max_cwnd < mnet->cwnd) { 387 max_cwnd_net = mnet; 388 max_cwnd = mnet->cwnd; 389 } else if (max_cwnd == mnet->cwnd) { 390 uint32_t rndval; 391 uint8_t this_random; 392 393 if (stcb->asoc.hb_random_idx > 3) { 394 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 395 memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values)); 396 this_random = stcb->asoc.hb_random_values[0]; 397 stcb->asoc.hb_random_idx++; 398 stcb->asoc.hb_ect_randombit = 0; 399 } else { 400 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 401 stcb->asoc.hb_random_idx++; 402 stcb->asoc.hb_ect_randombit = 0; 403 } 404 if (this_random % 2 == 1) { 405 max_cwnd_net = mnet; 406 max_cwnd = mnet->cwnd; /* Useless? */ 407 } 408 } 409 } 410 /* 411 * JRS 5/14/07 - After all destination have been considered 412 * as alternates, check to see if there was some active 413 * destination (not in PF state). If not, check to see if 414 * there was some PF destination with the minimum number of 415 * errors. If not, return the original destination. If 416 * there is a min_errors_net, remove the PF flag from that 417 * destination, set the cwnd to one or two MTUs, and return 418 * the destination as an alt. If there was some active 419 * destination with a highest cwnd, return the destination 420 * as an alt. 421 */ 422 if (max_cwnd_net == NULL) { 423 if (min_errors_net == NULL) { 424 return (net); 425 } 426 min_errors_net->dest_state &= ~SCTP_ADDR_PF; 427 min_errors_net->cwnd = min_errors_net->mtu * stcb->asoc.sctp_cmt_pf; 428 if (SCTP_OS_TIMER_PENDING(&min_errors_net->rxt_timer.timer)) { 429 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 430 stcb, min_errors_net, 431 SCTP_FROM_SCTP_TIMER + SCTP_LOC_2); 432 } 433 SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from PF to active with %d errors.\n", 434 min_errors_net, min_errors_net->error_count); 435 return (min_errors_net); 436 } else { 437 return (max_cwnd_net); 438 } 439 } 440 /* 441 * JRS 5/14/07 - If mode is set to 1, use the CMT policy for 442 * choosing an alternate net. 443 */ 444 else if (mode == 1) { 445 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 446 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 447 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 448 /* 449 * will skip ones that are not-reachable or 450 * unconfirmed 451 */ 452 continue; 453 } 454 if (max_cwnd < mnet->cwnd) { 455 max_cwnd_net = mnet; 456 max_cwnd = mnet->cwnd; 457 } else if (max_cwnd == mnet->cwnd) { 458 uint32_t rndval; 459 uint8_t this_random; 460 461 if (stcb->asoc.hb_random_idx > 3) { 462 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 463 memcpy(stcb->asoc.hb_random_values, &rndval, 464 sizeof(stcb->asoc.hb_random_values)); 465 this_random = stcb->asoc.hb_random_values[0]; 466 stcb->asoc.hb_random_idx = 0; 467 stcb->asoc.hb_ect_randombit = 0; 468 } else { 469 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 470 stcb->asoc.hb_random_idx++; 471 stcb->asoc.hb_ect_randombit = 0; 472 } 473 if (this_random % 2) { 474 max_cwnd_net = mnet; 475 max_cwnd = mnet->cwnd; 476 } 477 } 478 } 479 if (max_cwnd_net) { 480 return (max_cwnd_net); 481 } 482 } 483 mnet = net; 484 once = 0; 485 486 if (mnet == NULL) { 487 mnet = TAILQ_FIRST(&stcb->asoc.nets); 488 if (mnet == NULL) { 489 return (NULL); 490 } 491 } 492 do { 493 alt = TAILQ_NEXT(mnet, sctp_next); 494 if (alt == NULL) { 495 once++; 496 if (once > 1) { 497 break; 498 } 499 alt = TAILQ_FIRST(&stcb->asoc.nets); 500 if (alt == NULL) { 501 return (NULL); 502 } 503 } 504 if (alt->ro.ro_rt == NULL) { 505 if (alt->ro._s_addr) { 506 sctp_free_ifa(alt->ro._s_addr); 507 alt->ro._s_addr = NULL; 508 } 509 alt->src_addr_selected = 0; 510 } 511 /* sa_ignore NO_NULL_CHK */ 512 if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) && 513 (alt->ro.ro_rt != NULL) && 514 (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) { 515 /* Found a reachable address */ 516 break; 517 } 518 mnet = alt; 519 } while (alt != NULL); 520 521 if (alt == NULL) { 522 /* Case where NO insv network exists (dormant state) */ 523 /* we rotate destinations */ 524 once = 0; 525 mnet = net; 526 do { 527 if (mnet == NULL) { 528 return (TAILQ_FIRST(&stcb->asoc.nets)); 529 } 530 alt = TAILQ_NEXT(mnet, sctp_next); 531 if (alt == NULL) { 532 once++; 533 if (once > 1) { 534 break; 535 } 536 alt = TAILQ_FIRST(&stcb->asoc.nets); 537 } 538 /* sa_ignore NO_NULL_CHK */ 539 if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) && 540 (alt != net)) { 541 /* Found an alternate address */ 542 break; 543 } 544 mnet = alt; 545 } while (alt != NULL); 546 } 547 if (alt == NULL) { 548 return (net); 549 } 550 return (alt); 551 } 552 553 static void 554 sctp_backoff_on_timeout(struct sctp_tcb *stcb, 555 struct sctp_nets *net, 556 int win_probe, 557 int num_marked, int num_abandoned) 558 { 559 if (net->RTO == 0) { 560 net->RTO = stcb->asoc.minrto; 561 } 562 net->RTO <<= 1; 563 if (net->RTO > stcb->asoc.maxrto) { 564 net->RTO = stcb->asoc.maxrto; 565 } 566 if ((win_probe == 0) && (num_marked || num_abandoned)) { 567 /* We don't apply penalty to window probe scenarios */ 568 /* JRS - Use the congestion control given in the CC module */ 569 stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); 570 } 571 } 572 573 #ifndef INVARIANTS 574 static void 575 sctp_recover_sent_list(struct sctp_tcb *stcb) 576 { 577 struct sctp_tmit_chunk *chk, *tp2; 578 struct sctp_association *asoc; 579 580 asoc = &stcb->asoc; 581 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 582 for (; chk != NULL; chk = tp2) { 583 tp2 = TAILQ_NEXT(chk, sctp_next); 584 if ((compare_with_wrap(stcb->asoc.last_acked_seq, 585 chk->rec.data.TSN_seq, 586 MAX_TSN)) || 587 (stcb->asoc.last_acked_seq == chk->rec.data.TSN_seq)) { 588 589 SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n", 590 chk, chk->rec.data.TSN_seq, stcb->asoc.last_acked_seq); 591 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 592 if (chk->pr_sctp_on) { 593 if (asoc->pr_sctp_cnt != 0) 594 asoc->pr_sctp_cnt--; 595 } 596 if (chk->data) { 597 /* sa_ignore NO_NULL_CHK */ 598 sctp_free_bufspace(stcb, asoc, chk, 1); 599 sctp_m_freem(chk->data); 600 if (asoc->peer_supports_prsctp && PR_SCTP_BUF_ENABLED(chk->flags)) { 601 asoc->sent_queue_cnt_removeable--; 602 } 603 } 604 chk->data = NULL; 605 asoc->sent_queue_cnt--; 606 sctp_free_a_chunk(stcb, chk); 607 } 608 } 609 SCTP_PRINTF("after recover order is as follows\n"); 610 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 611 for (; chk != NULL; chk = tp2) { 612 tp2 = TAILQ_NEXT(chk, sctp_next); 613 SCTP_PRINTF("chk:%p TSN:%x\n", chk, chk->rec.data.TSN_seq); 614 } 615 } 616 617 #endif 618 619 static int 620 sctp_mark_all_for_resend(struct sctp_tcb *stcb, 621 struct sctp_nets *net, 622 struct sctp_nets *alt, 623 int window_probe, 624 int *num_marked, 625 int *num_abandoned) 626 { 627 628 /* 629 * Mark all chunks (well not all) that were sent to *net for 630 * retransmission. Move them to alt for there destination as well... 631 * We only mark chunks that have been outstanding long enough to 632 * have received feed-back. 633 */ 634 struct sctp_tmit_chunk *chk, *tp2; 635 struct sctp_nets *lnets; 636 struct timeval now, min_wait, tv; 637 int cur_rtt; 638 int cnt_abandoned; 639 int audit_tf, num_mk, fir; 640 unsigned int cnt_mk; 641 uint32_t orig_flight, orig_tf; 642 uint32_t tsnlast, tsnfirst; 643 int recovery_cnt = 0; 644 645 646 /* none in flight now */ 647 audit_tf = 0; 648 fir = 0; 649 /* 650 * figure out how long a data chunk must be pending before we can 651 * mark it .. 652 */ 653 (void)SCTP_GETTIME_TIMEVAL(&now); 654 /* get cur rto in micro-seconds */ 655 cur_rtt = (((net->lastsa >> 2) + net->lastsv) >> 1); 656 cur_rtt *= 1000; 657 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 658 sctp_log_fr(cur_rtt, 659 stcb->asoc.peers_rwnd, 660 window_probe, 661 SCTP_FR_T3_MARK_TIME); 662 sctp_log_fr(net->flight_size, 663 SCTP_OS_TIMER_PENDING(&net->fr_timer.timer), 664 SCTP_OS_TIMER_ACTIVE(&net->fr_timer.timer), 665 SCTP_FR_CWND_REPORT); 666 sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); 667 } 668 tv.tv_sec = cur_rtt / 1000000; 669 tv.tv_usec = cur_rtt % 1000000; 670 min_wait = now; 671 timevalsub(&min_wait, &tv); 672 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 673 /* 674 * if we hit here, we don't have enough seconds on the clock 675 * to account for the RTO. We just let the lower seconds be 676 * the bounds and don't worry about it. This may mean we 677 * will mark a lot more than we should. 678 */ 679 min_wait.tv_sec = min_wait.tv_usec = 0; 680 } 681 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 682 sctp_log_fr(cur_rtt, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); 683 sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); 684 } 685 /* 686 * Our rwnd will be incorrect here since we are not adding back the 687 * cnt * mbuf but we will fix that down below. 688 */ 689 orig_flight = net->flight_size; 690 orig_tf = stcb->asoc.total_flight; 691 692 net->fast_retran_ip = 0; 693 /* Now on to each chunk */ 694 cnt_abandoned = 0; 695 num_mk = cnt_mk = 0; 696 tsnfirst = tsnlast = 0; 697 #ifndef INVARIANTS 698 start_again: 699 #endif 700 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 701 for (; chk != NULL; chk = tp2) { 702 tp2 = TAILQ_NEXT(chk, sctp_next); 703 if ((compare_with_wrap(stcb->asoc.last_acked_seq, 704 chk->rec.data.TSN_seq, 705 MAX_TSN)) || 706 (stcb->asoc.last_acked_seq == chk->rec.data.TSN_seq)) { 707 /* Strange case our list got out of order? */ 708 SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x", 709 (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq); 710 recovery_cnt++; 711 #ifdef INVARIANTS 712 panic("last acked >= chk on sent-Q"); 713 #else 714 SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt); 715 sctp_recover_sent_list(stcb); 716 if (recovery_cnt < 10) { 717 goto start_again; 718 } else { 719 SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt); 720 } 721 #endif 722 } 723 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { 724 /* 725 * found one to mark: If it is less than 726 * DATAGRAM_ACKED it MUST not be a skipped or marked 727 * TSN but instead one that is either already set 728 * for retransmission OR one that needs 729 * retransmission. 730 */ 731 732 /* validate its been outstanding long enough */ 733 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 734 sctp_log_fr(chk->rec.data.TSN_seq, 735 chk->sent_rcv_time.tv_sec, 736 chk->sent_rcv_time.tv_usec, 737 SCTP_FR_T3_MARK_TIME); 738 } 739 if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { 740 /* 741 * we have reached a chunk that was sent 742 * some seconds past our min.. forget it we 743 * will find no more to send. 744 */ 745 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 746 sctp_log_fr(0, 747 chk->sent_rcv_time.tv_sec, 748 chk->sent_rcv_time.tv_usec, 749 SCTP_FR_T3_STOPPED); 750 } 751 continue; 752 } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && 753 (window_probe == 0)) { 754 /* 755 * we must look at the micro seconds to 756 * know. 757 */ 758 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 759 /* 760 * ok it was sent after our boundary 761 * time. 762 */ 763 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 764 sctp_log_fr(0, 765 chk->sent_rcv_time.tv_sec, 766 chk->sent_rcv_time.tv_usec, 767 SCTP_FR_T3_STOPPED); 768 } 769 continue; 770 } 771 } 772 if (stcb->asoc.peer_supports_prsctp && PR_SCTP_TTL_ENABLED(chk->flags)) { 773 /* Is it expired? */ 774 if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) { 775 /* Yes so drop it */ 776 if (chk->data) { 777 (void)sctp_release_pr_sctp_chunk(stcb, 778 chk, 779 (SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT), 780 SCTP_SO_NOT_LOCKED); 781 cnt_abandoned++; 782 } 783 continue; 784 } 785 } 786 if (stcb->asoc.peer_supports_prsctp && PR_SCTP_RTX_ENABLED(chk->flags)) { 787 /* Has it been retransmitted tv_sec times? */ 788 if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { 789 if (chk->data) { 790 (void)sctp_release_pr_sctp_chunk(stcb, 791 chk, 792 (SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT), 793 SCTP_SO_NOT_LOCKED); 794 cnt_abandoned++; 795 } 796 continue; 797 } 798 } 799 if (chk->sent < SCTP_DATAGRAM_RESEND) { 800 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 801 num_mk++; 802 if (fir == 0) { 803 fir = 1; 804 tsnfirst = chk->rec.data.TSN_seq; 805 } 806 tsnlast = chk->rec.data.TSN_seq; 807 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 808 sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 809 0, SCTP_FR_T3_MARKED); 810 } 811 if (chk->rec.data.chunk_was_revoked) { 812 /* deflate the cwnd */ 813 chk->whoTo->cwnd -= chk->book_size; 814 chk->rec.data.chunk_was_revoked = 0; 815 } 816 net->marked_retrans++; 817 stcb->asoc.marked_retrans++; 818 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 819 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, 820 chk->whoTo->flight_size, 821 chk->book_size, 822 (uintptr_t) chk->whoTo, 823 chk->rec.data.TSN_seq); 824 } 825 sctp_flight_size_decrease(chk); 826 sctp_total_flight_decrease(stcb, chk); 827 stcb->asoc.peers_rwnd += chk->send_size; 828 stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); 829 } 830 chk->sent = SCTP_DATAGRAM_RESEND; 831 SCTP_STAT_INCR(sctps_markedretrans); 832 833 /* reset the TSN for striking and other FR stuff */ 834 chk->rec.data.doing_fast_retransmit = 0; 835 /* Clear any time so NO RTT is being done */ 836 chk->do_rtt = 0; 837 if (alt != net) { 838 sctp_free_remote_addr(chk->whoTo); 839 chk->no_fr_allowed = 1; 840 chk->whoTo = alt; 841 atomic_add_int(&alt->ref_count, 1); 842 } else { 843 chk->no_fr_allowed = 0; 844 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 845 chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 846 } else { 847 chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 848 } 849 } 850 /* 851 * CMT: Do not allow FRs on retransmitted TSNs. 852 */ 853 if (stcb->asoc.sctp_cmt_on_off == 1) { 854 chk->no_fr_allowed = 1; 855 } 856 #ifdef THIS_SHOULD_NOT_BE_DONE 857 } else if (chk->sent == SCTP_DATAGRAM_ACKED) { 858 /* remember highest acked one */ 859 could_be_sent = chk; 860 #endif 861 } 862 if (chk->sent == SCTP_DATAGRAM_RESEND) { 863 cnt_mk++; 864 } 865 } 866 if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { 867 /* we did not subtract the same things? */ 868 audit_tf = 1; 869 } 870 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 871 sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); 872 } 873 #ifdef SCTP_DEBUG 874 if (num_mk) { 875 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 876 tsnlast); 877 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n", 878 num_mk, (u_long)stcb->asoc.peers_rwnd); 879 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 880 tsnlast); 881 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n", 882 num_mk, 883 (int)stcb->asoc.peers_rwnd); 884 } 885 #endif 886 *num_marked = num_mk; 887 *num_abandoned = cnt_abandoned; 888 /* 889 * Now check for a ECN Echo that may be stranded And include the 890 * cnt_mk'd to have all resends in the control queue. 891 */ 892 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 893 if (chk->sent == SCTP_DATAGRAM_RESEND) { 894 cnt_mk++; 895 } 896 if ((chk->whoTo == net) && 897 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 898 sctp_free_remote_addr(chk->whoTo); 899 chk->whoTo = alt; 900 if (chk->sent != SCTP_DATAGRAM_RESEND) { 901 chk->sent = SCTP_DATAGRAM_RESEND; 902 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 903 cnt_mk++; 904 } 905 atomic_add_int(&alt->ref_count, 1); 906 } 907 } 908 #ifdef THIS_SHOULD_NOT_BE_DONE 909 if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { 910 /* fix it so we retransmit the highest acked anyway */ 911 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 912 cnt_mk++; 913 could_be_sent->sent = SCTP_DATAGRAM_RESEND; 914 } 915 #endif 916 if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { 917 #ifdef INVARIANTS 918 SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", 919 cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); 920 #endif 921 #ifndef SCTP_AUDITING_ENABLED 922 stcb->asoc.sent_queue_retran_cnt = cnt_mk; 923 #endif 924 } 925 if (audit_tf) { 926 SCTPDBG(SCTP_DEBUG_TIMER4, 927 "Audit total flight due to negative value net:%p\n", 928 net); 929 stcb->asoc.total_flight = 0; 930 stcb->asoc.total_flight_count = 0; 931 /* Clear all networks flight size */ 932 TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { 933 lnets->flight_size = 0; 934 SCTPDBG(SCTP_DEBUG_TIMER4, 935 "Net:%p c-f cwnd:%d ssthresh:%d\n", 936 lnets, lnets->cwnd, lnets->ssthresh); 937 } 938 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 939 if (chk->sent < SCTP_DATAGRAM_RESEND) { 940 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 941 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 942 chk->whoTo->flight_size, 943 chk->book_size, 944 (uintptr_t) chk->whoTo, 945 chk->rec.data.TSN_seq); 946 } 947 sctp_flight_size_increase(chk); 948 sctp_total_flight_increase(stcb, chk); 949 } 950 } 951 } 952 /* 953 * Setup the ecn nonce re-sync point. We do this since 954 * retranmissions are NOT setup for ECN. This means that do to 955 * Karn's rule, we don't know the total of the peers ecn bits. 956 */ 957 chk = TAILQ_FIRST(&stcb->asoc.send_queue); 958 if (chk == NULL) { 959 stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq; 960 } else { 961 stcb->asoc.nonce_resync_tsn = chk->rec.data.TSN_seq; 962 } 963 stcb->asoc.nonce_wait_for_ecne = 0; 964 stcb->asoc.nonce_sum_check = 0; 965 /* We return 1 if we only have a window probe outstanding */ 966 return (0); 967 } 968 969 970 int 971 sctp_t3rxt_timer(struct sctp_inpcb *inp, 972 struct sctp_tcb *stcb, 973 struct sctp_nets *net) 974 { 975 struct sctp_nets *alt; 976 int win_probe, num_mk, num_abandoned; 977 978 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 979 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); 980 } 981 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 982 struct sctp_nets *lnet; 983 984 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 985 if (net == lnet) { 986 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); 987 } else { 988 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); 989 } 990 } 991 } 992 /* Find an alternate and mark those for retransmission */ 993 if ((stcb->asoc.peers_rwnd == 0) && 994 (stcb->asoc.total_flight < net->mtu)) { 995 SCTP_STAT_INCR(sctps_timowindowprobe); 996 win_probe = 1; 997 } else { 998 win_probe = 0; 999 } 1000 1001 /* 1002 * JRS 5/14/07 - If CMT PF is on and the destination if not already 1003 * in PF state, set the destination to PF state and store the 1004 * current time as the time that the destination was last active. In 1005 * addition, find an alternate destination with PF-based 1006 * find_alt_net(). 1007 */ 1008 if ((stcb->asoc.sctp_cmt_on_off == 1) && 1009 (stcb->asoc.sctp_cmt_pf > 0)) { 1010 if ((net->dest_state & SCTP_ADDR_PF) != SCTP_ADDR_PF) { 1011 net->dest_state |= SCTP_ADDR_PF; 1012 net->last_active = sctp_get_tick_count(); 1013 SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from active to PF.\n", 1014 net); 1015 } 1016 alt = sctp_find_alternate_net(stcb, net, 2); 1017 } else if (stcb->asoc.sctp_cmt_on_off == 1) { 1018 /* 1019 * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is being 1020 * used, then pick dest with largest ssthresh for any 1021 * retransmission. 1022 */ 1023 alt = sctp_find_alternate_net(stcb, net, 1); 1024 /* 1025 * CUCv2: If a different dest is picked for the 1026 * retransmission, then new (rtx-)pseudo_cumack needs to be 1027 * tracked for orig dest. Let CUCv2 track new (rtx-) 1028 * pseudo-cumack always. 1029 */ 1030 net->find_pseudo_cumack = 1; 1031 net->find_rtx_pseudo_cumack = 1; 1032 } else { /* CMT is OFF */ 1033 alt = sctp_find_alternate_net(stcb, net, 0); 1034 } 1035 num_mk = 0; 1036 num_abandoned = 0; 1037 (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, 1038 &num_mk, &num_abandoned); 1039 /* FR Loss recovery just ended with the T3. */ 1040 stcb->asoc.fast_retran_loss_recovery = 0; 1041 1042 /* CMT FR loss recovery ended with the T3 */ 1043 net->fast_retran_loss_recovery = 0; 1044 1045 /* 1046 * setup the sat loss recovery that prevents satellite cwnd advance. 1047 */ 1048 stcb->asoc.sat_t3_loss_recovery = 1; 1049 stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; 1050 1051 /* Backoff the timer and cwnd */ 1052 sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned); 1053 if (win_probe == 0) { 1054 /* We don't do normal threshold management on window probes */ 1055 if (sctp_threshold_management(inp, stcb, net, 1056 stcb->asoc.max_send_times)) { 1057 /* Association was destroyed */ 1058 return (1); 1059 } else { 1060 if (net != stcb->asoc.primary_destination) { 1061 /* send a immediate HB if our RTO is stale */ 1062 struct timeval now; 1063 unsigned int ms_goneby; 1064 1065 (void)SCTP_GETTIME_TIMEVAL(&now); 1066 if (net->last_sent_time.tv_sec) { 1067 ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000; 1068 } else { 1069 ms_goneby = 0; 1070 } 1071 if ((ms_goneby > net->RTO) || (net->RTO == 0)) { 1072 /* 1073 * no recent feed back in an RTO or 1074 * more, request a RTT update 1075 */ 1076 if (sctp_send_hb(stcb, 1, net) < 0) 1077 /* 1078 * Less than 0 means we lost 1079 * the assoc 1080 */ 1081 return (1); 1082 } 1083 } 1084 } 1085 } else { 1086 /* 1087 * For a window probe we don't penalize the net's but only 1088 * the association. This may fail it if SACKs are not coming 1089 * back. If sack's are coming with rwnd locked at 0, we will 1090 * continue to hold things waiting for rwnd to raise 1091 */ 1092 if (sctp_threshold_management(inp, stcb, NULL, 1093 stcb->asoc.max_send_times)) { 1094 /* Association was destroyed */ 1095 return (1); 1096 } 1097 } 1098 if (net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 1099 /* Move all pending over too */ 1100 sctp_move_chunks_from_net(stcb, net); 1101 1102 /* 1103 * Get the address that failed, to force a new src address 1104 * selecton and a route allocation. 1105 */ 1106 if (net->ro._s_addr) { 1107 sctp_free_ifa(net->ro._s_addr); 1108 net->ro._s_addr = NULL; 1109 } 1110 net->src_addr_selected = 0; 1111 1112 /* Force a route allocation too */ 1113 if (net->ro.ro_rt) { 1114 RTFREE(net->ro.ro_rt); 1115 net->ro.ro_rt = NULL; 1116 } 1117 /* Was it our primary? */ 1118 if ((stcb->asoc.primary_destination == net) && (alt != net)) { 1119 /* 1120 * Yes, note it as such and find an alternate note: 1121 * this means HB code must use this to resent the 1122 * primary if it goes active AND if someone does a 1123 * change-primary then this flag must be cleared 1124 * from any net structures. 1125 */ 1126 if (sctp_set_primary_addr(stcb, 1127 (struct sockaddr *)NULL, 1128 alt) == 0) { 1129 net->dest_state |= SCTP_ADDR_WAS_PRIMARY; 1130 } 1131 } 1132 } else if ((stcb->asoc.sctp_cmt_on_off == 1) && 1133 (stcb->asoc.sctp_cmt_pf > 0) && 1134 ((net->dest_state & SCTP_ADDR_PF) == SCTP_ADDR_PF)) { 1135 /* 1136 * JRS 5/14/07 - If the destination hasn't failed completely 1137 * but is in PF state, a PF-heartbeat needs to be sent 1138 * manually. 1139 */ 1140 if (sctp_send_hb(stcb, 1, net) < 0) 1141 /* Return less than 0 means we lost the association */ 1142 return (1); 1143 } 1144 /* 1145 * Special case for cookie-echo'ed case, we don't do output but must 1146 * await the COOKIE-ACK before retransmission 1147 */ 1148 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1149 /* 1150 * Here we just reset the timer and start again since we 1151 * have not established the asoc 1152 */ 1153 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 1154 return (0); 1155 } 1156 if (stcb->asoc.peer_supports_prsctp) { 1157 struct sctp_tmit_chunk *lchk; 1158 1159 lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); 1160 /* C3. See if we need to send a Fwd-TSN */ 1161 if (compare_with_wrap(stcb->asoc.advanced_peer_ack_point, 1162 stcb->asoc.last_acked_seq, MAX_TSN)) { 1163 /* 1164 * ISSUE with ECN, see FWD-TSN processing for notes 1165 * on issues that will occur when the ECN NONCE 1166 * stuff is put into SCTP for cross checking. 1167 */ 1168 send_forward_tsn(stcb, &stcb->asoc); 1169 if (lchk) { 1170 /* Assure a timer is up */ 1171 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); 1172 } 1173 } 1174 } 1175 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 1176 sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); 1177 } 1178 return (0); 1179 } 1180 1181 int 1182 sctp_t1init_timer(struct sctp_inpcb *inp, 1183 struct sctp_tcb *stcb, 1184 struct sctp_nets *net) 1185 { 1186 /* bump the thresholds */ 1187 if (stcb->asoc.delayed_connection) { 1188 /* 1189 * special hook for delayed connection. The library did NOT 1190 * complete the rest of its sends. 1191 */ 1192 stcb->asoc.delayed_connection = 0; 1193 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1194 return (0); 1195 } 1196 if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) { 1197 return (0); 1198 } 1199 if (sctp_threshold_management(inp, stcb, net, 1200 stcb->asoc.max_init_times)) { 1201 /* Association was destroyed */ 1202 return (1); 1203 } 1204 stcb->asoc.dropped_special_cnt = 0; 1205 sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0); 1206 if (stcb->asoc.initial_init_rto_max < net->RTO) { 1207 net->RTO = stcb->asoc.initial_init_rto_max; 1208 } 1209 if (stcb->asoc.numnets > 1) { 1210 /* If we have more than one addr use it */ 1211 struct sctp_nets *alt; 1212 1213 alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); 1214 if (alt != stcb->asoc.primary_destination) { 1215 sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination); 1216 stcb->asoc.primary_destination = alt; 1217 } 1218 } 1219 /* Send out a new init */ 1220 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1221 return (0); 1222 } 1223 1224 /* 1225 * For cookie and asconf we actually need to find and mark for resend, then 1226 * increment the resend counter (after all the threshold management stuff of 1227 * course). 1228 */ 1229 int 1230 sctp_cookie_timer(struct sctp_inpcb *inp, 1231 struct sctp_tcb *stcb, 1232 struct sctp_nets *net) 1233 { 1234 struct sctp_nets *alt; 1235 struct sctp_tmit_chunk *cookie; 1236 1237 /* first before all else we must find the cookie */ 1238 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { 1239 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 1240 break; 1241 } 1242 } 1243 if (cookie == NULL) { 1244 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1245 /* FOOBAR! */ 1246 struct mbuf *oper; 1247 1248 oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 1249 0, M_DONTWAIT, 1, MT_DATA); 1250 if (oper) { 1251 struct sctp_paramhdr *ph; 1252 uint32_t *ippp; 1253 1254 SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) + 1255 sizeof(uint32_t); 1256 ph = mtod(oper, struct sctp_paramhdr *); 1257 ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 1258 ph->param_length = htons(SCTP_BUF_LEN(oper)); 1259 ippp = (uint32_t *) (ph + 1); 1260 *ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_3); 1261 } 1262 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_4; 1263 sctp_abort_an_association(inp, stcb, SCTP_INTERNAL_ERROR, 1264 oper, SCTP_SO_NOT_LOCKED); 1265 } else { 1266 #ifdef INVARIANTS 1267 panic("Cookie timer expires in wrong state?"); 1268 #else 1269 SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc)); 1270 return (0); 1271 #endif 1272 } 1273 return (0); 1274 } 1275 /* Ok we found the cookie, threshold management next */ 1276 if (sctp_threshold_management(inp, stcb, cookie->whoTo, 1277 stcb->asoc.max_init_times)) { 1278 /* Assoc is over */ 1279 return (1); 1280 } 1281 /* 1282 * cleared theshold management now lets backoff the address & select 1283 * an alternate 1284 */ 1285 stcb->asoc.dropped_special_cnt = 0; 1286 sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0); 1287 alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); 1288 if (alt != cookie->whoTo) { 1289 sctp_free_remote_addr(cookie->whoTo); 1290 cookie->whoTo = alt; 1291 atomic_add_int(&alt->ref_count, 1); 1292 } 1293 /* Now mark the retran info */ 1294 if (cookie->sent != SCTP_DATAGRAM_RESEND) { 1295 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1296 } 1297 cookie->sent = SCTP_DATAGRAM_RESEND; 1298 /* 1299 * Now call the output routine to kick out the cookie again, Note we 1300 * don't mark any chunks for retran so that FR will need to kick in 1301 * to move these (or a send timer). 1302 */ 1303 return (0); 1304 } 1305 1306 int 1307 sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1308 struct sctp_nets *net) 1309 { 1310 struct sctp_nets *alt; 1311 struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; 1312 1313 if (stcb->asoc.stream_reset_outstanding == 0) { 1314 return (0); 1315 } 1316 /* find the existing STRRESET, we use the seq number we sent out on */ 1317 (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); 1318 if (strrst == NULL) { 1319 return (0); 1320 } 1321 /* do threshold management */ 1322 if (sctp_threshold_management(inp, stcb, strrst->whoTo, 1323 stcb->asoc.max_send_times)) { 1324 /* Assoc is over */ 1325 return (1); 1326 } 1327 /* 1328 * cleared theshold management now lets backoff the address & select 1329 * an alternate 1330 */ 1331 sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0); 1332 alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0); 1333 sctp_free_remote_addr(strrst->whoTo); 1334 strrst->whoTo = alt; 1335 atomic_add_int(&alt->ref_count, 1); 1336 1337 /* See if a ECN Echo is also stranded */ 1338 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1339 if ((chk->whoTo == net) && 1340 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1341 sctp_free_remote_addr(chk->whoTo); 1342 if (chk->sent != SCTP_DATAGRAM_RESEND) { 1343 chk->sent = SCTP_DATAGRAM_RESEND; 1344 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1345 } 1346 chk->whoTo = alt; 1347 atomic_add_int(&alt->ref_count, 1); 1348 } 1349 } 1350 if (net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 1351 /* 1352 * If the address went un-reachable, we need to move to 1353 * alternates for ALL chk's in queue 1354 */ 1355 sctp_move_chunks_from_net(stcb, net); 1356 } 1357 /* mark the retran info */ 1358 if (strrst->sent != SCTP_DATAGRAM_RESEND) 1359 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1360 strrst->sent = SCTP_DATAGRAM_RESEND; 1361 1362 /* restart the timer */ 1363 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo); 1364 return (0); 1365 } 1366 1367 int 1368 sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1369 struct sctp_nets *net) 1370 { 1371 struct sctp_nets *alt; 1372 struct sctp_tmit_chunk *asconf, *chk, *nchk; 1373 1374 /* is this a first send, or a retransmission? */ 1375 if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { 1376 /* compose a new ASCONF chunk and send it */ 1377 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1378 } else { 1379 /* 1380 * Retransmission of the existing ASCONF is needed 1381 */ 1382 1383 /* find the existing ASCONF */ 1384 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); 1385 if (asconf == NULL) { 1386 return (0); 1387 } 1388 /* do threshold management */ 1389 if (sctp_threshold_management(inp, stcb, asconf->whoTo, 1390 stcb->asoc.max_send_times)) { 1391 /* Assoc is over */ 1392 return (1); 1393 } 1394 if (asconf->snd_count > stcb->asoc.max_send_times) { 1395 /* 1396 * Something is rotten: our peer is not responding 1397 * to ASCONFs but apparently is to other chunks. 1398 * i.e. it is not properly handling the chunk type 1399 * upper bits. Mark this peer as ASCONF incapable 1400 * and cleanup. 1401 */ 1402 SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); 1403 sctp_asconf_cleanup(stcb, net); 1404 return (0); 1405 } 1406 /* 1407 * cleared threshold management, so now backoff the net and 1408 * select an alternate 1409 */ 1410 sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0); 1411 alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0); 1412 if (asconf->whoTo != alt) { 1413 sctp_free_remote_addr(asconf->whoTo); 1414 asconf->whoTo = alt; 1415 atomic_add_int(&alt->ref_count, 1); 1416 } 1417 /* See if an ECN Echo is also stranded */ 1418 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1419 if ((chk->whoTo == net) && 1420 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1421 sctp_free_remote_addr(chk->whoTo); 1422 chk->whoTo = alt; 1423 if (chk->sent != SCTP_DATAGRAM_RESEND) { 1424 chk->sent = SCTP_DATAGRAM_RESEND; 1425 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1426 } 1427 atomic_add_int(&alt->ref_count, 1); 1428 } 1429 } 1430 for (chk = asconf; chk; chk = nchk) { 1431 nchk = TAILQ_NEXT(chk, sctp_next); 1432 if (chk->whoTo != alt) { 1433 sctp_free_remote_addr(chk->whoTo); 1434 chk->whoTo = alt; 1435 atomic_add_int(&alt->ref_count, 1); 1436 } 1437 if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) 1438 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1439 chk->sent = SCTP_DATAGRAM_RESEND; 1440 } 1441 if (net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 1442 /* 1443 * If the address went un-reachable, we need to move 1444 * to the alternate for ALL chunks in queue 1445 */ 1446 sctp_move_chunks_from_net(stcb, net); 1447 } 1448 /* mark the retran info */ 1449 if (asconf->sent != SCTP_DATAGRAM_RESEND) 1450 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1451 asconf->sent = SCTP_DATAGRAM_RESEND; 1452 1453 /* send another ASCONF if any and we can do */ 1454 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); 1455 } 1456 return (0); 1457 } 1458 1459 /* Mobility adaptation */ 1460 void 1461 sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1462 struct sctp_nets *net) 1463 { 1464 if (stcb->asoc.deleted_primary == NULL) { 1465 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); 1466 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1467 return; 1468 } 1469 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); 1470 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1471 sctp_free_remote_addr(stcb->asoc.deleted_primary); 1472 stcb->asoc.deleted_primary = NULL; 1473 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1474 return; 1475 } 1476 1477 /* 1478 * For the shutdown and shutdown-ack, we do not keep one around on the 1479 * control queue. This means we must generate a new one and call the general 1480 * chunk output routine, AFTER having done threshold management. 1481 * It is assumed that net is non-NULL. 1482 */ 1483 int 1484 sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1485 struct sctp_nets *net) 1486 { 1487 struct sctp_nets *alt; 1488 1489 /* first threshold managment */ 1490 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1491 /* Assoc is over */ 1492 return (1); 1493 } 1494 sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1495 /* second select an alternative */ 1496 alt = sctp_find_alternate_net(stcb, net, 0); 1497 1498 /* third generate a shutdown into the queue for out net */ 1499 sctp_send_shutdown(stcb, alt); 1500 1501 /* fourth restart timer */ 1502 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); 1503 return (0); 1504 } 1505 1506 int 1507 sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1508 struct sctp_nets *net) 1509 { 1510 struct sctp_nets *alt; 1511 1512 /* first threshold managment */ 1513 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1514 /* Assoc is over */ 1515 return (1); 1516 } 1517 sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1518 /* second select an alternative */ 1519 alt = sctp_find_alternate_net(stcb, net, 0); 1520 1521 /* third generate a shutdown into the queue for out net */ 1522 sctp_send_shutdown_ack(stcb, alt); 1523 1524 /* fourth restart timer */ 1525 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); 1526 return (0); 1527 } 1528 1529 static void 1530 sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, 1531 struct sctp_tcb *stcb) 1532 { 1533 struct sctp_stream_out *outs; 1534 struct sctp_stream_queue_pending *sp; 1535 unsigned int chks_in_queue = 0; 1536 int being_filled = 0; 1537 1538 /* 1539 * This function is ONLY called when the send/sent queues are empty. 1540 */ 1541 if ((stcb == NULL) || (inp == NULL)) 1542 return; 1543 1544 if (stcb->asoc.sent_queue_retran_cnt) { 1545 SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", 1546 stcb->asoc.sent_queue_retran_cnt); 1547 stcb->asoc.sent_queue_retran_cnt = 0; 1548 } 1549 SCTP_TCB_SEND_LOCK(stcb); 1550 if (TAILQ_EMPTY(&stcb->asoc.out_wheel)) { 1551 int i, cnt = 0; 1552 1553 /* Check to see if a spoke fell off the wheel */ 1554 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1555 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 1556 sctp_insert_on_wheel(stcb, &stcb->asoc, &stcb->asoc.strmout[i], 1); 1557 cnt++; 1558 } 1559 } 1560 if (cnt) { 1561 /* yep, we lost a spoke or two */ 1562 SCTP_PRINTF("Found an additional %d streams NOT on outwheel, corrected\n", cnt); 1563 } else { 1564 /* no spokes lost, */ 1565 stcb->asoc.total_output_queue_size = 0; 1566 } 1567 SCTP_TCB_SEND_UNLOCK(stcb); 1568 return; 1569 } 1570 SCTP_TCB_SEND_UNLOCK(stcb); 1571 /* Check to see if some data queued, if so report it */ 1572 TAILQ_FOREACH(outs, &stcb->asoc.out_wheel, next_spoke) { 1573 if (!TAILQ_EMPTY(&outs->outqueue)) { 1574 TAILQ_FOREACH(sp, &outs->outqueue, next) { 1575 if (sp->msg_is_complete) 1576 being_filled++; 1577 chks_in_queue++; 1578 } 1579 } 1580 } 1581 if (chks_in_queue != stcb->asoc.stream_queue_cnt) { 1582 SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", 1583 stcb->asoc.stream_queue_cnt, chks_in_queue); 1584 } 1585 if (chks_in_queue) { 1586 /* call the output queue function */ 1587 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1588 if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1589 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1590 /* 1591 * Probably should go in and make it go back through 1592 * and add fragments allowed 1593 */ 1594 if (being_filled == 0) { 1595 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", 1596 chks_in_queue); 1597 } 1598 } 1599 } else { 1600 SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", 1601 (u_long)stcb->asoc.total_output_queue_size); 1602 stcb->asoc.total_output_queue_size = 0; 1603 } 1604 } 1605 1606 int 1607 sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1608 struct sctp_nets *net, int cnt_of_unconf) 1609 { 1610 int ret; 1611 1612 if (net) { 1613 if (net->hb_responded == 0) { 1614 if (net->ro._s_addr) { 1615 /* 1616 * Invalidate the src address if we did not 1617 * get a response last time. 1618 */ 1619 sctp_free_ifa(net->ro._s_addr); 1620 net->ro._s_addr = NULL; 1621 net->src_addr_selected = 0; 1622 } 1623 sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1624 } 1625 /* Zero PBA, if it needs it */ 1626 if (net->partial_bytes_acked) { 1627 net->partial_bytes_acked = 0; 1628 } 1629 } 1630 if ((stcb->asoc.total_output_queue_size > 0) && 1631 (TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1632 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1633 sctp_audit_stream_queues_for_size(inp, stcb); 1634 } 1635 /* Send a new HB, this will do threshold managment, pick a new dest */ 1636 if (cnt_of_unconf == 0) { 1637 if (sctp_send_hb(stcb, 0, NULL) < 0) { 1638 return (1); 1639 } 1640 } else { 1641 /* 1642 * this will send out extra hb's up to maxburst if there are 1643 * any unconfirmed addresses. 1644 */ 1645 uint32_t cnt_sent = 0; 1646 1647 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1648 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) && 1649 (net->dest_state & SCTP_ADDR_REACHABLE)) { 1650 cnt_sent++; 1651 if (net->hb_responded == 0) { 1652 /* Did we respond last time? */ 1653 if (net->ro._s_addr) { 1654 sctp_free_ifa(net->ro._s_addr); 1655 net->ro._s_addr = NULL; 1656 net->src_addr_selected = 0; 1657 } 1658 } 1659 ret = sctp_send_hb(stcb, 1, net); 1660 if (ret < 0) 1661 return 1; 1662 else if (ret == 0) { 1663 break; 1664 } 1665 if (cnt_sent >= SCTP_BASE_SYSCTL(sctp_hb_maxburst)) 1666 break; 1667 } 1668 } 1669 } 1670 return (0); 1671 } 1672 1673 void 1674 sctp_pathmtu_timer(struct sctp_inpcb *inp, 1675 struct sctp_tcb *stcb, 1676 struct sctp_nets *net) 1677 { 1678 uint32_t next_mtu, mtu; 1679 1680 next_mtu = sctp_get_next_mtu(inp, net->mtu); 1681 1682 if ((next_mtu > net->mtu) && (net->port == 0)) { 1683 if ((net->src_addr_selected == 0) || 1684 (net->ro._s_addr == NULL) || 1685 (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1686 if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1687 sctp_free_ifa(net->ro._s_addr); 1688 net->ro._s_addr = NULL; 1689 net->src_addr_selected = 0; 1690 } else if (net->ro._s_addr == NULL) { 1691 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1692 if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1693 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1694 1695 /* KAME hack: embed scopeid */ 1696 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 1697 } 1698 #endif 1699 1700 net->ro._s_addr = sctp_source_address_selection(inp, 1701 stcb, 1702 (sctp_route_t *) & net->ro, 1703 net, 0, stcb->asoc.vrf_id); 1704 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1705 if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1706 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1707 1708 (void)sa6_recoverscope(sin6); 1709 } 1710 #endif /* INET6 */ 1711 } 1712 if (net->ro._s_addr) 1713 net->src_addr_selected = 1; 1714 } 1715 if (net->ro._s_addr) { 1716 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt); 1717 if (net->port) { 1718 mtu -= sizeof(struct udphdr); 1719 } 1720 if (mtu > next_mtu) { 1721 net->mtu = next_mtu; 1722 } 1723 } 1724 } 1725 /* restart the timer */ 1726 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 1727 } 1728 1729 void 1730 sctp_autoclose_timer(struct sctp_inpcb *inp, 1731 struct sctp_tcb *stcb, 1732 struct sctp_nets *net) 1733 { 1734 struct timeval tn, *tim_touse; 1735 struct sctp_association *asoc; 1736 int ticks_gone_by; 1737 1738 (void)SCTP_GETTIME_TIMEVAL(&tn); 1739 if (stcb->asoc.sctp_autoclose_ticks && 1740 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1741 /* Auto close is on */ 1742 asoc = &stcb->asoc; 1743 /* pick the time to use */ 1744 if (asoc->time_last_rcvd.tv_sec > 1745 asoc->time_last_sent.tv_sec) { 1746 tim_touse = &asoc->time_last_rcvd; 1747 } else { 1748 tim_touse = &asoc->time_last_sent; 1749 } 1750 /* Now has long enough transpired to autoclose? */ 1751 ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec); 1752 if ((ticks_gone_by > 0) && 1753 (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) { 1754 /* 1755 * autoclose time has hit, call the output routine, 1756 * which should do nothing just to be SURE we don't 1757 * have hanging data. We can then safely check the 1758 * queues and know that we are clear to send 1759 * shutdown 1760 */ 1761 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); 1762 /* Are we clean? */ 1763 if (TAILQ_EMPTY(&asoc->send_queue) && 1764 TAILQ_EMPTY(&asoc->sent_queue)) { 1765 /* 1766 * there is nothing queued to send, so I'm 1767 * done... 1768 */ 1769 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1770 /* only send SHUTDOWN 1st time thru */ 1771 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 1772 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 1773 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 1774 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 1775 } 1776 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 1777 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 1778 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 1779 stcb->sctp_ep, stcb, 1780 asoc->primary_destination); 1781 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1782 stcb->sctp_ep, stcb, 1783 asoc->primary_destination); 1784 } 1785 } 1786 } else { 1787 /* 1788 * No auto close at this time, reset t-o to check 1789 * later 1790 */ 1791 int tmp; 1792 1793 /* fool the timer startup to use the time left */ 1794 tmp = asoc->sctp_autoclose_ticks; 1795 asoc->sctp_autoclose_ticks -= ticks_gone_by; 1796 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1797 net); 1798 /* restore the real tick value */ 1799 asoc->sctp_autoclose_ticks = tmp; 1800 } 1801 } 1802 }
Cache object: 0a19f2c8d4476a7ccdd0a762f96cbc39
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